Apex domains cannot have CNAME records.
Question and response
Question
dig 0-novomilionario.com. NS
Answer
0-novomilionario.com. 5 NS ns-521.awsdns-01.net.
0-novomilionario.com. 5 NS ns-915.awsdns-50.net.
0-novomilionario.com. 5 NS ns-1339.awsdns-39.org.
0-novomilionario.com. 5 NS ns-1857.awsdns-40.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0